Stuffing box and the like



Apr. 3, 1923. 1,450,421,

E. W'. KAV'ANAUGH ET AL.

STUFFING BOX AND THE LIKE.

man MAY15,1919.

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Y1 h2/'M2071 Iwan/amm@ MMZJIMW@ jjykezazzamgf 5% dauw mxMf m Patented Apr. 3, 1923.

narran EDWARDW. KAVANAUGH'AND MICHAEL J. KAVANAUGH,orliviinnneronfs; l

MINNESOTA. f f y STUFFING BOX AND THE'LIKE.

y Applicata@ ined May 15,

To all whom t may concern.'

Be it known that we, EDWARD W. KAvA- NAUGH and MICHAEL J. KAVANAUGH, citizens o-f the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Stuffing Boxes and the like; and they' do hereby declare the following to be a. full, clear, and exact description of the invention,=.such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in stuffing boxes and the like, and hasV for its object to provide the same with a steam condensing chamber; and, to this end, it 'conpartly in central section, illustrating the invention applied to a steam cylinder and the rod of its piston;

Fig. 2 is a view principally in section, taken on the line 2 2 of Fig. 1; and

F ig. 3 vis a detail view with some parts sectionedon the line 3 3 of Fig, 2. l

The numeral 4 indicates one of the cylinders of a steam engine, and the numeral 5 indicates the head thereof, through which works the rod 6, of a piston 7. A stuliing box 8 is detachably secured to the cylinder head 5 by a plurality of circumferentially spaced bolts 9. In the inner end of the stufing box S is a metallic packing 10, which surrounds the piston rod 6 and is compressed between the cylinder head 5 and said stuiiing box. A gland 11, in the outer end of the stuiing box S', 4through which the piston rod 6 also projects, compresses a suitable packing 12, onto the piston rod 6 and stuffing 8. Within the stuiiing box 8 is a primary steam-condensing chamberv 13',

which is open to the piston rod: 6 between4 the packings 10 and 12.

Located above the stuiiing box 8 is a secondary expansion chamber or tank 14, having a filling opening normally closed by a screw cap 15, and also havingablow-ofi' valve 16. A pipe 17 connects the bottom of the chamber 13 with the bottom of the 1919. serial no. asaaia.v

tank 14 to afford communication therebetween, and has, at its lowermostA point, a drain plug 18; Leading from the top of the chamber 13 is a steam pipe 19, which extends through the bottom of the tank 14 and above the liquid level Z` therein. The liquid in the tank 14'may be either an' ac-V cumulation of water, due to 'condensationy of steam escaping between the pistonrod 6 and the packing 10, or part water and part oil, said oil being placed therein for the purpose of lubricating the piston rod. 1

By the use ofour improved stuing box, all steam escaping betweenthe piston rod and packing 10 will yenter the chamber V13 and Aeither be condensedthere, depending on the f amount of liquid therein, or it may pass upward through the pipe 19 and be condensed in the tank 14. Bythus trapping the escaping steam, the packing 12 remains tight and prevents therescape of steam thereof, which is highly objectionable for various reasons, one of which is that itobstructs the View of an engineer on an engine. The trapped steam, when condensed, also acts as a lubricant for the piston rod and thus prolongs the life of the same as well as the life of the packing. Y l

What'we claim is 1. The combination with a cylinder and a piston, of a stu'ing box having inner and outer packings through which the piston rod works, a chamber between said packing open to the piston rod having communication with said cylinder only by leakage through the inner packing and means for keeping said chamber constantly full of waterandl for condensing steam which scapes into said chamber 'from said cylin- 2.'The combination with a cylinder and piston, of a stuiing box attached tothe head of the cylinder and having inner and outer packings through which' the piston rod works,"said stuffing box having a chamber open to the piston rod between the lpackings,said cylinder having communication withthe chamber only byleakage throughv the inner packing, a condensing tank, a

supply 'conduit-between the chamber and tank, and ya steam pipe leading from the chamber to the tank above the liquid'level therein. 3. The combination with a cylinder .and

4 a piston, ofk a stuiiing box'attached to the head of the cylinder andhavng inner and Asaid tank, Aoperative to Apermit escaped outei' packngs through which :the @piston steam. to hecondensed therein. rod Works, a chamber in said stufng box In testimony whereof they ax their open to the'p'ston rod between thepalehngs Signatures n preeenoe of two Witnesses.

0 havlng comlnunleatlon Wlth the oyhnder EDH/*ARD YV. KAVNAUGH.

only by leakage throuffh the inner ypacking m and condensing tank DahovefsaidA chamber' MICHAEL J' KAVANAUGH' having a conduit adapted to keep said charm Vtnesses: ber lled with Water'und steal-1n escape 1 CLARA DEMAREST, IH yconduit from the top of said Chamber to HARRY D. KILGORE. 

